spi.h


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#ifndef _SPI_H_
#define _SPI_H_

#include <stdint.h>
#include <avr/io.h>

#define PORT_SPI    PORTB
#define DDR_SPI     DDRB
#define DD_MISO     DDB4
#define DD_MOSI     DDB3
#define DD_SS       DDB2
#define DD_SCK      DDB5

inline void spi_cs_low()
{
  PORT_SPI &= ~(_BV(DD_SS));
}

inline void spi_cs_high()
{
  PORT_SPI |= _BV(DD_SS);
}

extern void spi_init();
extern uint8_t spi_two_byte(uint8_t cmd, uint8_t data);

#endif /* _SPI_H_ */